| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 100.24 | 18 |
| 2015 | 93.63 | 23 |
| 2014 | 87.74 | 24 |
| 2013 | 83.52 | 28 |
| 2012 | 86 | 24 |
| 2011 | 81.98 | 28 |
| 2010 | 79.25 | 33 |
| 2009 | 79.02 | 36 |
| 2008 | 72.54 | 40 |
| 2007 | 69.81 | 40 |
| 2006 | 64.57 | 43 |
| 2005 | 60.42 | 45 |
| 2004 | 56.43 | 52 |
| 2003 | 56.09 | 51 |
| 2002 | 55.05 | 53 |
| 2001 | 58.41 | 45 |
| 2000 | 46.49 | 57 |
| 1999 | 42.81 | 65 |
| 1998 | 39.33 | 70 |
| 1997 | 36.97 | 74 |
| 1996 | 35.12 | 75 |
| 1995 | 31.77 | 79 |
| 1994 | 44.49 | 58 |
| 1993 | 93.66 | 10 |
| 1992 | 60.93 | 28 |
| 1991 | 35.03 | 68 |
| 1990 | 30.39 | 73 |
| 1989 | 111.33 | 8 |
| 1988 | 75.08 | 16 |
| 1987 | 19.88 | 102 |
| 1986 | 19.97 | 98 |